基于XRF的紫金山铜矿床硫地质特征

XRF-based analysis of the sulfur geological characteristics of the Zijinshan copper deposit,Fujian Province

福建紫金山铜矿床属高硫浅成中低温热液矿床,矿石中主要含铜矿物为蓝辉铜矿、铜蓝和硫砷铜矿等,且铜矿物与黄铁矿密切共生。由于铜矿石中硫含量较高,导致铜精矿中硫含量超标,w(S)/w(Cu)比值为2.0~2.1,远高于冶炼要求的1.15~1.20,影响其经济价值。使用X射线荧光(XRF)光谱分析对紫金山铜矿中S元素的分布进行数字化研究,查明硫的空间分布规律和赋存状态,划分铜矿石类型,为紫金山铜矿今后的采选工作提供参考。

The Zijinshan copper deposit in Fujian Province falls within the high？sulfur shallow medium？low temperature hydrothermaldeposits. Its main copper？bearing minerals are digenite, covellite and enargite, and the copper ores are closely symbiotic with pyrite.The high sulfur content in copper ores results in the excessive sulfur content in copper concentrate. Thus, w（S） / w（Cu） ratio of 2.0-2. 1 is far higher than that of smelting requirement 1. 15-1.20, which brings difficulties to the sales of copper concentrate. The distribution of sulfur element in Zijinshan copper deposit was digitized by X-ray fluorescence （XRF） spectrometry, the spatial distributionregularities and occurrence of sulfur were identified, and the types of copper ores were classified to provide reference for future miningand selection of the Zijinshan copper deposit.